长江全长大约六千三百千米，写作______．
六千三百写作：6300．
故答案为：6300．
--Could you tell me __________?
--Of course, last night.
A．when you reached Beijing
B．why you came to Beijing
C．how you came to Beijing
D．where you came from
螺丝批按刀头形状可分为（）
A.一字
B.十字
C.丁字
D.梅花
